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No 3-4 Upshift

Checks

Causes

1-2 Shift Solenoid Valve

Inspect for a malfunction of the 1-2 shift solenoid valve.

2-3 Shift Solenoid Valve

Inspect for a malfunction of the 2-3 shift solenoid valve.

Transmission Fluid Temperature (TFT) Sensor

Inspect for a faulty TFT sensor.

Overdrive Switch

Inspect for a faulty overdrive switch.

Park/Neutral (P/N) Position Switch

Inspect for an improperly positioned or faulty P/N position switch.

Transmission Control Module (TCM)

Inspect for a faulty TCM.

Control Valve Spool

Inspect for a malfunction of control valve spool.

   


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